John Blakiston-Houston DL JP (11 September 1829 – 27 February 1920) was an Irish Member of Parliament.
He was a grandson of Sir Matthew Blakiston, 2nd Baronet.
He married Marian Gertrude Streatfield, of Sussex (d. 1890); the couple had twelve children.
[1] John Blakiston-Houston was High Sheriff (1860) and Deputy Lieutenant (D.L.)
Between 1898 and 1900 he was the Irish Unionist Member of parliament for North Down at Westminster.